"Their Royal Highnesses The Duke and Duchess of Sussex are very pleased to announce that The Duchess of Sussex is expecting a baby in the spring of 2019," the palace announced in a pair of tweets that landed as Meghan and husband Prince Harry began their royal tour of Australia, New Zealand, Fiji and Tonga. They arrived in Sydney on Sunday.

"Their Royal Highnesses have appreciated all of the support they have received from people around the world since their wedding in May and are delighted to be able to share this happy news with the public," the palace added.

Meghan, 37, has sported looser clothing than usual for her last couple of public appearances, fueling pregnancy rumors – especially the navy Givenchy suit coat she wore to Princess Eugenie's wedding Friday at St. George's Chapel, the same Windsor Castle church where she and Harry tied the knot just shy of five months ago.

The pair hinted they wanted children in their first sit-down interview together. Harry told The BBC following their engagement, "Of course, one step at a time, and hopefully we will start a family in the near future."

He said in 2015, before he met Meghan, that he would "love to have kids right now."

Meghan has also talked about wanting to have children.

She said in a 2016 interview that becoming a mother was on her "bucket list." She was still acting in "Suits" at the time.

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And baby makes three: Eleven months after they announced their engagement, Prince Harry and wife Duchess Meghan are expecting their first child. Kensington Palace announced the news Monday, Oct. 15, a few hours after the couple landed in Sydney to begin their 16-day tour of Australia, New Zealand, Fiji and Tonga. AP

Prince Harry and Duchess Meghan made an official visit to Sussex on Oct. 3, 2018 in Chichester, United Kingdom. The Duke and Duchess married on May 19th 2018 in Windsor and were styled the Duke & Duchess of Sussex by Queen Elizabeth II on the morning of their May 19 wedding. Chris Jackson, Getty Images

During their visit, they visited the Royal Pavilion in Brighton, England. It was originally built in the late 1780s as a seaside retreat for King George IV before he took the throne and later turned into a museum. Tim Ireland, AP

Prince Harry and Meghan Markle commemorated Anzac Day on April 25, 2018. The day highlights the first major military action Australian and New Zealand forces made during WWI. ADRIAN DENNIS/AFP/Getty Images

Days after becoming a father for the third time, Prince William joined his brother and soon-to-be sister-in-law for services at Westminster Abbey. William greeted her with kisses on both cheeks. Frank Augstein/AP

Meghan Markle wore a v-neck dress by Hugo Boss while attending a memorial service with her fiancé Prince Harry in London on April 23. The memorial commemorated the 25th anniversary of the murder of Stephen Lawrence, a black British teen who was killed in a racially motivated attack. STR, EPA-EFE

Meghan Markle and Prince Harry attended a women's empowerment reception at the Royal Aeronautical Society during the Commonwealth Heads of Government Meeting, in London, April 19, 2018. Chris Jackson, AP

Although black is usually reserved for royal funerals it's not entirely unprecedented for royals-in-waiting to don the color, and Markle looked nothing short of sleek in a dress with an asymmetrical neckline by Black Halo. CHRIS JACKSON, AFP/Getty Images

The royal couple-to-be showed off their obvious chemistry when they attended a women's empowerment reception during the Commonwealth Heads of Government Meeting, in London, April 19, 2018. Chris Jackson, AP

All wedding planning and no fun could make for dull royals, but thankfully Prince Harry and Meghan Markle can turn to the Invictus Games. On April 6, the couple stepped out in Bath, England to attend the UK Team Trials for the competition to be held in Sydney in October. The international sport event gives wounded, injured and sick servicemen and women -- both veteran and active -- the opportunity to compete. Chris Jackson/Getty Images

An important step in Meghan Markle's royal education: Her first joint official appearance with Queen Elizabeth II and the royal family. Prince Harry and his American fiancee attended the Commonwealth Day Service at Westminster Abbey on March 12, 2018. DANIEL LEAL-OLIVAS, AFP/Getty Images

Meghan Markle wore a creamy white coat by Amanda Wakeley and a matching beret-style hat over a dark dress for the Commonwealth Day service at Westminster Abbey on March 12, 2018. Samir Hussein/WireImage

After the service, the young royals, including Meghan Markle, met with school children in the abbey dean's yard. Meghan crouched to receive a posy of flowers from a young girl. DANIEL LEAL-OLIVAS, AFP/Getty Images

Meghan Markle made her first joint appearance with Harry, Prince William and Duchess Kate at the first Royal Foundation Forum on Feb.28, 2018 in London. Markle's name will be added to the foundation's title when she weds and launches her new life as royal philanthropist. CHRIS JACKSON, AFP/Getty Images

The fourth stop on the "Meet Meghan Markle" tour of the United Kingdom found Prince Harry and his bride-to-be in picturesque Edinburgh in Scotland, where their first event of the day was a walkabout outside Edinburgh Castle, on Feb. 13, 2018. ROBERT PERRY, EPA-EFE

Holding hands, the couple were greeted by large and enthusiastic crowds in Edinburgh. Markle's fashion gesture on her first official visit to Scotland included wearing a Burberry tartan coat and carrying a crossbody bag by Scottish brand Strathberry, Feb. 13, 2018. WPA Pool, Getty Images

As Prince Harry introduces Meghan Markle to the United Kingdom, with their latest stop in Edinburgh, Scotland, the couple have continued to disregard stuffy royal custom with plenty of public displays of affection and touching. ROBERT PERRY, EPA-EFE

Prince Harry and his fiancée Meghan Markle are introduced to Cruachan IV, the Shetland pony Regimental mascot for the Black Watch; the obstreperous pony tried to nip at the royal fingers as Harry and Meghan laughed. ROBERT PERRY, EPA-EFE

In another impressive royal backdrop, Harry and Meghan went to the Palace of Holyroodhouse, the seat of Scottish royalty, including Harry's distant Scottish ancestors, Mary Queen of Scots, and her son, King James 1 of England. The couple walked the corridors of the palace on their way to a reception for young people. Scotland's Year of Young People 2018 aims to inspire Scotland through celebrating youth achievements and strengthening their voice on social issues. ANDREW MILLIGAN, AFP/Getty Images

Prince Harry and his fiancée Meghan Markle at a reception for young people in the Palace of Holyroodhouse in Edinburgh, during their visit to Scotland on Feb. 13, 2018. Her all-black outfit under included sailor-style Veronica Beard palazzo pants and high heels. ANDREW MILLIGAN, AFP/Getty Images

Prince Harry and his fiancée Meghan Markle visited Wales on Jan. 18, 2018, in the latest stop on the "Meet Meghan" tour of Britain before their May 19 wedding. Chris Jackson, Chris Jackson/Getty Images

For her visit to Cardiff Castle in Wales, royal bride-to-be Meghan Markle wore a black Stella McCartney coat cinched with a wide ribbon-style belt, plus black boots. She carried a mini-saddlebag purse by the British brand Demellier. Karwai Tang/WireImage

With iconic Cardiff Castle as a backdrop, Prince Harry and Meghan Markle plunged into a walkabout, shaking hands with children, many waving Welsh flags and even some American flags, during thier visit to Cardiff, Wales, on Jan. 18, 2018. Chris Jackson, Chris Jackson/Getty Images

Prince Harry and Meghan Markle visit Reprezent 107.3FM on Jan. 9, 2018 in London. The Reprezent training program "was established in 2008 in response to an alarming rise in knife crime, to help young people develop and socialize through radio," Kensington Palace tweeted the day of the event. Samir Hussein/WireImage